Reality TV star Kim Kardashian, pregnant with her second child, addressed speculation on Wednesday that she and husband Kanye West are having a boy.

"So many rumors," Kardashian, 34, tweeted. "We are not having twins, yes I am carrying my own baby lol & we have not told anyone the sex of our baby yet!"

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Us Weekly earlier in the day had cited anonymous "multiple sources" reportedly confirming she and rapper West, 38, were having a son. Rumors elsewhere suggested Kardashian might be expecting twins or was using a surrogate. "Nothing is confirmed unless you hear it from me!" she wrote.

"I guess I get a little feisty when I'm pregnant," she told E! News last week, after posting obscenity-laden tweets complaining of pregnancy illness and promoting her upcoming new website. "So I was just responding to people that come up with the most ridiculous things as if they're facts," she said.

Kardashian announced in a teaser clip that aired immediately after the May 31 episode of "Keeping Up With the Kardashians" that she was expecting. She and West are already the parents of daughter North, who turns 2 on Monday.